"I want him to face justice and explain why. It's my nephews more than anything."

Scotland Yard has referred its handling of the case to watchdog the Independent Police Complaints Commission (IPCC), amid questions over why it took so long to escalate the missing persons inquiry into the performer's disappearance.

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The force said: "The Metropolitan Police has today made a voluntary referral to the IPCC in relation to the Sian Blake missing person investigation.

"An initial review has highlighted some potential issues regarding the handling and grading of the missing persons investigation."

It is also understood a relative of Ms Blake contacted the NSPCC on December 16 expressing concerns about domestic violence and the information was passed on to the Metropolitan Police and Bexley Council in London on the same day.